#pragma once 
#include<iostream>
#include<unistd.h>
using namespace std;
typedef void(*work_t)(int);
typedef void(*task_t)(int,pid_t);

void PrintLog(int fd, pid_t pid)
{
    cout << "sub process: " << pid << ", fd: " << fd<< ", task is : printf log task\n" << endl;
}

void ReloadConf(int fd, pid_t pid)
{
    cout << "sub process: " << pid << ", fd: " << fd<< ", task is : reload conf task\n" << endl;
}

void ConnectMysql(int fd, pid_t pid)
{
    cout << "sub process: " << pid << ", fd: " << fd<< ", task is : connect mysql task\n" << endl;
}



task_t tasks[3]  = {PrintLog,ReloadConf,ConnectMysql};
uint32_t NextTask()
{
    return rand()%3;
}
void worker(int fd)
{
    //从0中读取任务
    while(true)
    {
        uint32_t command_code = 0;
        ssize_t n = read(0, &command_code,sizeof(command_code));
        if(n == sizeof(command_code))
        {
            if(command_code >= 3) continue;
            tasks[command_code](fd,getpid());
        }
        else if(n == 0) //当读到0时， 表示进程停止写入
        {
            std::cout<<"sub process:"<<getpid() <<" quit now ..." <<std::endl;
            break;
        }
    }
}